1 | <?php |
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2 | |||
3 | /* |
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4 | * This file is part of the ICanBoogie package. |
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5 | * |
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6 | * (c) Olivier Laviale <[email protected]> |
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7 | * |
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8 | * For the full copyright and license information, please view the LICENSE |
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9 | * file that was distributed with this source code. |
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10 | */ |
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11 | |||
12 | namespace ICanBoogie\Storage; |
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13 | |||
14 | /** |
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15 | * A storage using Redis. |
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16 | */ |
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17 | class RedisStorage implements Storage, \ArrayAccess |
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18 | { |
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19 | use Storage\ArrayAccess; |
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20 | use Storage\ClearWithIterator; |
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21 | |||
22 | /** |
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23 | * @var \Redis |
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24 | */ |
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25 | private $redis; |
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26 | |||
27 | /** |
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28 | * @var string |
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29 | */ |
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30 | private $prefix; |
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31 | |||
32 | /** |
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33 | * @param \Redis|mixed $redis |
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34 | */ |
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35 | public function __construct($redis, string $prefix) |
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36 | { |
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37 | $this->redis = $redis; |
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38 | $this->prefix = $prefix; |
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39 | } |
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40 | |||
41 | /** |
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42 | * @inheritdoc |
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43 | */ |
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44 | public function retrieve(string $key) |
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45 | { |
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46 | $value = $this->redis->get($this->prefix . $key); |
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47 | |||
48 | if ($value === false) |
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49 | { |
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50 | return null; |
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51 | } |
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52 | |||
53 | return unserialize($value); |
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54 | } |
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55 | |||
56 | /** |
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57 | * @inheritdoc |
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58 | */ |
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59 | public function exists(string $key): bool |
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60 | { |
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61 | return (bool) $this->redis->exists($this->prefix . $key); |
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62 | } |
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63 | |||
64 | /** |
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65 | * @inheritdoc |
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66 | */ |
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67 | public function store(string $key, $value, int $ttl = null): void |
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68 | { |
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69 | $key = $this->prefix . $key; |
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70 | |||
71 | if ($ttl) |
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72 | { |
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73 | $this->redis->set($key, serialize($value), $ttl); |
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74 | |||
75 | return; |
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76 | } |
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77 | |||
78 | $this->redis->set($key, serialize($value)); |
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79 | } |
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80 | |||
81 | /** |
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82 | * @inheritdoc |
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83 | */ |
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84 | public function eliminate(string $key): void |
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85 | { |
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86 | $this->redis->del($this->prefix . $key); |
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87 | } |
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88 | |||
89 | /** |
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90 | * @inheritdoc |
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91 | */ |
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92 | public function getIterator(): iterable |
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93 | { |
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94 | $redis = $this->redis; |
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95 | $prefix = $this->prefix; |
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96 | $prefix_length = strlen($prefix); |
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97 | $it = null; |
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98 | |||
99 | while(($keys = $redis->scan($it))) |
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100 | { |
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101 | foreach ($keys as $internal_key) |
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102 | { |
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103 | if (strpos($internal_key, $prefix) !== 0) |
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104 | { |
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105 | continue; |
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106 | } |
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107 | |||
108 | yield substr($internal_key, $prefix_length); |
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109 | } |
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110 | } |
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111 | } |
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112 | } |
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113 |
In PHP, under loose comparison (like
==
, or!=
, orswitch
conditions), values of different types might be equal.For
integer
values, zero is a special case, in particular the following results might be unexpected: